Cultilene (Cultiwool) 4x4x4 Rockwool Block (144 pieces per case) ventilation Comes with a built-in pre-filter

Comes with a built-in pre-filter

and agriculture use

Three speed settings

Made from Heavy Duty Clear Polyethylene

Cultilene (Cultiwool) 4x4x4 Rockwool Block (144 pieces per case) ventilation Comes with a built-in pre-filterCultilene Blocks have an optimum air water ratio for healthy root growth and allow for great continued rooting thanks to the extremely even distribution of water and EC. These blocks have an excellent water absorption and (re)saturation rate and feature the exclusive Plant Comfort fibre structure which has a lower density of resistance during rooting with no loss of firmness. All blocks except the 3x3x3 also have the Optiplus feature, which is a